This is the Great Planes ElectriFly RimFire 28-22-1380 Brushless Outrunner Electric Motor. FEATURES: Designed for explosive acceleration and maximum torque Lightened aluminum can houses high torque rare earth Neodymium magnets Double shielded bearings Better cooling means 50% more power than many other Outrunners of similar size Virtually maintenance-free; no commutators or brushes to wear out Two year quality guarantee through manufacturer beginning at date of purchase INCLUDES: Great Planes ElectriFly RimFire 28-22-1380 Brushless Outrunner Electric Motor with leads and 2mm male connectors, motor mount and built-in prop saver and two O-rings. REQUIRES: Speed control for Brushless Motors such as the ElectriFly Silver Series 12 (GPMM1810) and the ElectriFly Silver Series 25 (GPMM1820 *GPMM3122 3.5mm ML/2mm FEM BLT ADPT* SEE COMMENTS SPECS: Motor Diameter: 1.1" (28mm) Motor Length: .87" (22mm) Shaft Diameter: .12" (3mm) Shaft Length: .47" (12mm) Kv Rating: 1380 rpm/V Weight: .95oz (27g) Input Voltage: 7.4-11.1V (2-3S LiPo) Max. Constant Current: 9A Max Surge Current: 13.5A Max Constant Watts: 100W Burst Watts: 150W No Load Current: .4A Suggested Prop Sizes: 8x4 - 10x4.5 slow flyer COMMENTS: If 3mm Prop Adapters are needed order; GPMQ4930 3mm Set Screw Type GPMQ4959 3mm Collet Type If SS25 ESC (GPMM1820) is to be used, the 3.5mm Male Bullet to 2mm Female Bullet Adapter (GPMM3122) is required. jxs 4/20/06 ir/jxs